Bridge type concentric electric simple underground mouth opener

Abstract

The invention discloses a bridge type concentric electric simple underground mouth opener which comprises a cable connecting short section, a weighting short section, a motor speed change mechanism, a support arm positioning anti-rotation mechanism and a rotation butt joint mechanism which are connected in sequence. The motor speed change mechanism comprises a motor, the motor is sequentially connected with a main gear input connecting shaft, a primary gear set, a first secondary gear set, a second secondary gear set, a third secondary gear set, a fourth secondary gear set and a final secondary gear set, the main gear input connecting shaft is sleeved with a baffle, and a bearing is arranged at one inner end of a planetary gear outer sleeve. The baffle, the primary gear set, the first secondary gear set, the second secondary gear set, the third secondary gear set, the fourth secondary gear set and the final secondary gear set are sleeved with the planetary gear outer sleeve. The rotation torque is measured and adjusted to be increased; the test success rate is ensured, and the instrument is prevented from falling into a well to be damaged; and the structure is simple, damage caused by current adjustment is not easy to occur, and the maintenance cost is greatly reduced even if the damage is caused.

Description

Technical Field

[0001] This invention relates to the field of subdivided water injection equipment technology for water injection wells in water injection oilfields, and particularly to a simple bridge-type concentric electric downhole nozzle opener. Background Technology

[0002] Bridge-type concentric stratified water injection technology is one of the subdivided water injection technologies for water injection wells in water-injection oilfields. This technology involves wellbore water injection tools mainly composed of packers, concentric water distributors, and ball seats. Its subdivided injection principle utilizes water injection packers to achieve stratified isolation, while the bridge-type concentric water distributor injects water into each stratum. Bridge-type concentric subdivided water injection wells achieve accurate water volume distribution to each target stratum, primarily relying on surface-mounted electric adjustment. The adjustment principle involves a cable carrying a concentric electric adjustment instrument into the tubing. The positioning claw rests on a positioning step. Based on forward or reverse rotation commands sent from the ground, the adjustment instrument's regulating device drives the concentric movable cylinder to rotate, generating vertical displacement through a threaded mechanism. This changes the flow area of ​​the fixed water nozzle outlet, thereby adjusting the water injection volume.

[0003] During on-site ground testing and adjustment, problems frequently encountered include the water nozzles failing to open or close, or incomplete opening and closing. Analysis of the water nozzles revealed that this was primarily due to the accumulation of impurities such as rust, scale, and a mixture of oil, sludge, and sand within the gaps of the bridge-type concentric adjustable water nozzle. This caused conventional testing and adjustment instruments to be unable to properly test and adjust the water nozzles due to insufficient torque. Increasing the current to improve torque could easily burn out precision components such as the control board within the testing and adjustment instrument, resulting in significant losses.

[0004] Currently, there are two main measures to address this technical problem in oilfield production: The first is to perform well washing, but the success rate is low. This is mainly because well washing cannot completely remove impurities such as rust, scale, and oil sludge mixtures from the gap between the central sliding sleeve and the outer body of the bridge-type concentric water distributor; moreover, well washing can easily lead to the failure of the water well packer, making it impossible to achieve single-layer fine water injection in the injection wells. The second is to perform well inspection and testing, which involves running in a new bridge-type concentric water distributor for re-testing and adjustment. This method increases the cost of well inspection and testing, as well as the cost of multiple bridge-type concentric water distributors, packers, and other corresponding downhole tools, significantly increasing oilfield development costs; furthermore, some high-pressure injection wells require long-term pressure release before inspection and testing, affecting the injection time rate and water utilization rate. Summary of the Invention

[0005] This invention addresses the problem that conventional measuring and adjusting instruments cannot properly measure and adjust the water nozzles in complex well environments using bridge-type concentric layered water injection technology due to their low torque. It provides a simple bridge-type concentric electric downhole nozzle opener.

[0006] To solve the above-mentioned technical problems, the technical solution of the present invention is: a bridge-type concentric electric downhole simple nozzle opener, comprising a cable connecting section, a weighted section, a motor speed change mechanism, a support arm positioning anti-rotation mechanism, and a rotation docking mechanism connected in sequence; the motor speed change mechanism includes a six-stage gear set, which is connected to the motor through the main gear input connecting shaft.

[0007] The six-stage gear set of the motor speed change mechanism includes a primary gear set, a first-stage gear set, a second-stage gear set, a third-stage gear set, a fourth-stage gear set, and a final-stage secondary gear set connected in sequence. A baffle is fitted on the main gear input connecting shaft. A bearing is provided at one inner end of the planetary gear sleeve. The planetary gear sleeve is fitted outside the baffle, the primary gear set, the first-stage gear set, the second-stage gear set, the third-stage gear set, the fourth-stage gear set, and the final-stage secondary gear set.

[0008] Furthermore, the cable connection section, the weighted section, the motor speed change mechanism, the support arm positioning anti-rotation mechanism, and the rotation docking mechanism are connected by threads.

[0009] Furthermore, the final and secondary gear sets are connected to the keyway of the support arm positioning and anti-rotation mechanism.

[0010] Furthermore, the baffle is mounted on the main gear input connecting shaft via an internally installed bearing.

[0011] Furthermore, the quenching temperature of the primary gear set, the first stage gear set, the second stage gear set, the third stage gear set, the fourth stage gear set, and the final stage secondary gear set is 250°-350°.

[0012] Furthermore, the thickness of the primary gear set is 2-3 mm.

[0013] Furthermore, the gear thickness of the first-stage gear set is 3-4 mm.

[0014] Furthermore, the gear thickness of the second-stage gear set is 4-5 μm.

[0015] Furthermore, the gear thickness of the third-stage gear set is 5-6 mm.

[0016] Furthermore, the gear thickness of the fourth secondary gear set is 6-7mm.

[0017] Furthermore, the gear thickness of the final stage secondary gear set is 7-10mm.

[0018] Furthermore, the motor speed is 4000-5000 r / min.

[0019] The beneficial effects of this invention are: increased measurement and adjustment torque; effective avoidance of jamming during water well testing with large well inclination, ensuring test success rate and preventing instrument damage from falling into the well; simple structure, not easily damaged by current adjustment, and even if damaged, maintenance costs are significantly reduced; suitable for water wells with sand discharge, oil sludge return, poor water quality, poor quality injection tubing, etc., which are prone to impurities forming in the injection tubing, and has broad application prospects. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in this invention or related technologies, the accompanying drawings used in the description of the embodiments or related technologies will be briefly introduced below. Obviously, the accompanying drawings described below are some embodiments of this invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is a schematic diagram of the structure of the present invention;

[0022] Figure 2 This is a schematic diagram of the motor speed change mechanism.

[0023] Among them: 1-motor, 2-baffle, 3-main gear input connecting shaft, 4-primary gear set, 5-first stage gear set, 6-second stage gear set, 7-leakage plugging hole, 8-fourth stage gear set, 9-last stage secondary gear set, 10-planetary gear sleeve, 11-cable connection short section, 12-weighted short section, 13-motor speed change mechanism, 14-support arm positioning anti-rotation mechanism, 15-rotation docking mechanism. Detailed Implementation

[0024] The following will be combined with the appendix Figure 1-2 The technical solutions of the present invention have been clearly and completely described. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0025] The present invention is described in detail below through specific embodiments, but this does not limit the scope of protection of the present invention. Unless otherwise specified, the experimental methods used in the present invention are all conventional methods, and the experimental equipment, materials, reagents, etc. used can all be obtained commercially.

[0026] In the description of this invention, it should be noted that the terms "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first," "second," and "third" are used only for distinction and should not be construed as indicating or implying relative importance.

[0027] Furthermore, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0028] A bridge-type concentric electric downhole simple nozzle opener includes a cable connecting section 11, a weighted section 12, a motor speed change mechanism 13, a support arm positioning anti-rotation mechanism 14, and a rotation docking mechanism 15 connected in sequence by threads; the motor speed change mechanism 13 includes a six-stage gear set, which is connected to the motor 1 through the main gear input connecting shaft 3.

[0029] The six-stage gear set of the motor speed change mechanism 13 includes a primary gear set 4, a first-stage gear set 5, a second-stage gear set 6, a third-stage gear set 7, a fourth-stage gear set 8, and a final-stage secondary gear set 9 connected in sequence. The baffle 2 is mounted on the main gear input connecting shaft 3 via an internally installed bearing. A bearing is installed at one inner end of the planetary gear sleeve 10, which is fitted over the baffle 2, primary gear set 4, first-stage gear set 5, second-stage gear set 6, third-stage gear set 7, fourth-stage gear set 8, and final-stage secondary gear set 9. The final-stage secondary gear set 9 is connected to the keyway of the support arm positioning anti-rotation mechanism 14.

[0030] The quenching temperature of primary gear set 4, first-stage gear set 5, second-stage gear set 6, third-stage gear set 7, fourth-stage gear set 8, and final-stage secondary gear set 9 is 250°-350°.

[0031] The gear thickness of primary gear set 4 is 2-3 mm. The gear thickness of first-stage gear set 5 is 3-4 mm. The gear thickness of second-stage gear set 6 is 4-5 mm. The gear thickness of third-stage gear set 7 is 5-6 mm. The gear thickness of fourth-stage gear set 8 is 6-7 mm. The gear thickness of final-stage secondary gear set 9 is 7-10 mm. The speed of motor 1 is 4000-5000 r / min.

[0032] Cable connection section 11:

[0033] The test winch connects to short section 11 via a cable, which in turn connects the cable to the test instrument to send and receive signal commands.

[0034] Emphasis on short section 12:

[0035] The cable signal is transmitted through the weighted short section 12, and the counterweight enables the instrument to reach the well smoothly.

[0036] Motor speed change mechanism 13:

[0037] Power is supplied via cable to make motor 1 rotate, and the speed change mechanism generates a larger driving torque to rotate the working parts.

[0038] Outrigger positioning and anti-rotation mechanism 14:

[0039] When the instrument is lowered to the designated position in the downhole working tube, it needs to be positioned using the outrigger and docked at the designated position in the downhole working tube. The anti-rotation mechanism can be positioned at the designated position to prevent rotation.

[0040] Rotating docking mechanism 15:

[0041] After successful positioning of the outrigger, anti-rotation mechanism, and rotation docking, motor 1 generates rotational power from small torque to large torque through motor speed change mechanism 13, rotating the downhole tool to achieve normal measurement and adjustment.

[0042] This invention incorporates an internal current channel. Powered by a cable, it transmits measurement and adjustment commands in real time, achieving concentric positioning and docking with the downhole bridge-type concentric water distributor. A single deployment into the well allows for the completion of multi-layer water nozzle switching tasks, effectively improving the success rate and efficiency of measurement and adjustment. The number of weighted short sections 12 can be appropriately increased depending on the depth and injection pressure of the injection well, but it is recommended that the total weight of the instrument should not exceed 80% of the maximum tensile strength that the cable can withstand.

[0043] Compared with conventional integrated electric measuring and adjusting instruments, this invention has a large torque, short length, and simple structure. It can control the opening and closing of the water outlet of the water distributor under complex well conditions, thereby controlling the water injection volume of a single layer downhole, and thus achieving the purpose of controlling the water cut of surrounding oil wells and increasing the oil production of oil wells.

[0044] This invention can also be applied to the initial water tap operation after the well is handed over and before formal testing and commissioning.

[0045] This invention does not have a water flow testing function. When the conventional integrated electric measuring and adjusting instrument encounters obstacles, this invention can be used to first perform multiple full opening and closing operations of the water distributor's faucet to thoroughly clear the running resistance during forward and reverse rotation. After removing it, the conventional integrated electric measuring and adjusting instrument can then be lowered in for normal measurement and adjustment.

[0046] This invention does not have magnetic positioning function. It is necessary to closely combine the well depth data and tension load data displayed on the control panel inside the ground test vehicle to ensure that the simple nozzle reaches the designated position of the downhole working barrel.

[0047] This invention requires the use of a DC power regulator, which can adjust and set the voltage and current. It is recommended that the operating voltage be the rated value of motor 1 in the motor speed change mechanism 13. When the rated value of motor 1 in the motor speed change mechanism 13 is 110 volts, it is recommended that the operating current of the DC power regulator not exceed 130 mA to prevent motor burnout, which would cause the electric downhole nozzle to malfunction.

[0048] This invention can also combine data from surface water well flow meters and pressure gauges to accurately allocate the water injection volume of each single layer in a stratified water injection well.

[0049] The embodiments described above are merely preferred embodiments of the present invention, and not all feasible embodiments of the present invention. For those skilled in the art, any obvious modifications made without departing from the principles and spirit of the present invention should be considered to be included within the scope of protection of the claims. Although the present invention has been described above with reference to embodiments, various modifications can be made and components can be replaced with equivalents without departing from the scope of the present invention. In particular, as long as there is no technical conflict, the features in the embodiments disclosed in the present invention can be combined with each other in any way. The lack of an exhaustive description of these combinations in this specification is merely for the sake of brevity and resource conservation. Therefore, the present invention is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A bridge-type concentric electrically operated downhole simple open mouth device, characterized in that, The cable connecting short section (11), the weight short section (12), the motor speed change mechanism (13), the support arm positioning anti-rotation mechanism (14) and the rotary butt joint mechanism (15) are sequentially connected.

2. The bridge-type concentric electrically operated downhole simple unblocker according to claim 1, characterized in that, The six-stage gear set of the motor speed change mechanism (13) comprises a primary gear set (4), a first secondary gear set (5), a second secondary gear set (6), a third secondary gear set (7), a fourth secondary gear set (8) and a final secondary gear set (9) which are sequentially connected.

3. The bridge-type concentric electrically operated downhole simple unblocker according to claim 1, characterized in that, The cable connecting short section (11), the weight short section (12), the motor speed change mechanism (13), the support arm positioning anti-rotation mechanism (14) and the rotary butt joint mechanism (15) are connected through threads.

4. The bridge-type concentric electrically operated downhole simple unblocker according to claim 2, characterized in that, The final secondary gear set (9) is connected with the key groove of the support arm positioning anti-rotation mechanism (14).

5. The bridge-type concentric electrically operated downhole simple unblocker in accordance with claim 2, characterized by, The baffle (2) is sleeved on the main gear input connecting shaft (3) through the internally arranged bearing.

6. The bridge-type concentric electrically operated downhole simple unblocker in accordance with claim 2, characterized in that, The quenching temperature of the primary gear set (4), the first secondary gear set (5), the second secondary gear set (6), the third secondary gear set (7), the fourth secondary gear set (8) and the final secondary gear set (9) is 250-350°.

7. The bridge-type concentric electrically operated downhole simple unblocker in accordance with claim 2, characterized by, The gear thickness of the primary gear set (4) is 2-3mm.

8. The bridge-type concentric electrically operated downhole simple unblocker in accordance with claim 2, characterized in that, The gear thickness of the first secondary gear set (5) is 3-4mm.

9. The bridge-type concentric electrically operated downhole simple unblocker in accordance with claim 2, characterized in that, The gear thickness of the second secondary gear set (6) is 4-5mm.

10. The bridge-type concentric electrically operated downhole simple unblocker in accordance with claim 2, characterized in that, The gear thickness of the third secondary gear set (7) is 5-6mm.

11. The bridge-type concentric electrically operated downhole simple unblocker in accordance with claim 2, characterized in that, The gear thickness of the fourth secondary gear set (8) is 6-7mm.

12. The bridge-type concentric electrically operated downhole simple unblocker in accordance with claim 2, characterized in that, The gear thickness of the final secondary gear set (9) is 7-10mm.

13. The bridge-type concentric electrically operated downhole simple unblocker in accordance with claim 2, characterized in that, The rotating speed of the motor (1) is 4000-5000r / min.

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